Electromagnetically-operated bell.



C. I. SCHWARZE.

ELECTROMAGNETICALLY OPERATED BELL.

APPLICATION FILED JUNE 1. 1914.

Patanted Apr. 25, 1916.

All TMWIWW CARL J'. SCHWARZE, OF ADRIAN, MICHIGAN, ASSIGNOR T0 SCHWARZEELECTRIC COMPANY, OF ADRIAN, MICHIGAN, A CORPORATION OI MICHIGAN.

ELECTBOMAGNETICALLY-OPERATED BELL.

llJlWItMW.

T 0 all whom z'tmay concern:

Be it known that I, CARL J. SCHWARZE, a citizen of the United States ofAmerica, residing at Adrian, in the county of Lenawee and State ofMichigain'have invented certain new and useful Improvements inElectromagnetically Operated Bells, of which the following is aspecification, reference being had therein to the accompanying drawings.

The invention relates to electric bells and comprises the novelconstruction and arrangement of striker mechanism as hereinafter setforth.

In the drawings :-F igure 1 is a front elevation of the bell with thecover of the housing for the mechanism removed; Fig. 2 is a verticalcentral section thereof; and Fig. 3 is a vieW similar to Fig. 1 showinga modified construction.

A is the base or supporting frame upon which is mounted the bell B, andbeneath the bell is a housing C forinclos'ing the opcrating mechanism.This mechanism'comprises an electro-magnetic, vibratory unit D, whichactuates a reciprocatory striker rod E projecting upward and adapted toimpinge against the bell B. The unit D includes a supporting bracket E,a horse-shoe electro-magnet F mounted thereon, a vibratory armature G,a. vibratory circuit-interrupter H and a condenser I; all of these partsbeing mounted upon the bracket E so as to constitute a single unit. Thestriker rod E extends vertically through a guide bearing in the bracketE and at its lower end is attached to a spring J in the path of thearmature G while an abutment spring .l is provided for limiting themovement of the armature in the opposite direction. The arrangement issuch that whenever the armaturc is attracted by the magnet it will moveSpecification of Letters latent.

Patented Apr. 25, Matti.

Application filed .Tune 1, 1914. Serial No. 842,110.

the striker E upward, and upon theinterruption in the electric circuitthe striker will be returned by the tension of the spring J assisted bygravity.

In the modified construction shown in Fig. 3, a polarized magnet isemployed, comprising horseshoe permanent magnet K, which is arranged tosurround the unit D. The upper ends of the horseshoe are provided withpole pieces L which project inward and are clamped in contact with thecore members of the ele'ctro-magnet.

In operation, whenever the circuit is closed the armature is setinto-vibration and will impart its vibratory movement to the striker E.This will cause the sounding of the bell, and by reason of the fact thata rigid rod is employed as a striker instead of a flexible arm there isno necessity for ad justment.

What I claim as my invention is 1. The combination with a frame or base,of a bell mounted thereon, a housing on said base adjacent to said bell,an electro-magnetic vibratory unit arranged within said housing, astriker rod actuated axially by said vibratory unit and adapted toimpinge against said bell, and a horseshoe permanent magnet surroundingsaid unit and adapted to polarize the magnet thereof.

2. The combination with a bell, of an electro-magnetic unit, a strikerrod actuated axially by said unit and adapted to impinge against saidbell, and. a horseshoe permanent magnet surrounding said unit andadapted to polarize the magnet thereof.

In testimony whereof I affix my signature in presence of two witnesses.

CARL J. SCHWVARZE.

Witnesses JAMEs P. BARRY, IIENRIETIA E. Bowuax.

